Electron-discharge device



Dec. 15,1925. 1,565,569

' W. G. HOUSKEEPER ELECTRON DISCHARGE DEVICE Filed July 21, 1922 KEEPER siding at New York, in the county of New a centrally arranged tapped socket. York, State of New York, have invented In the assembl of this device a rod 18 60 Patented 15, 1925.

- UNITED STATES mm oFF cE.

WILLIAM G. nousxnnrna, or imw 1031:,

. COMPANY, HVCOBPORATED, 0] YORK, N. 1., A CORPORATION 0! NEW YORK- nmc'raoiv-mscnamn navrcn.

Application filed m 21, "a. Serial a... "can.

To all whom it may concern:

Be it known that I,\WILLIAM G. Honsa citizen of the United States, re

certain new and useful Improvements in Electron-Discharge Devices, of which the following is a full, clear, concise, and exact 17 extending outwardl through the stem 13. The 1nner end of t e anode is closed by means of cap 10 which is provided with having a threade end is inserted within the contammg vessel and is screwed into the socket atthe end of the anode. The stem and electrode assembly are then slid over description. I

This invention relates v to electron dis charge'devices and to methods of manufacturing them.

In-electron discharge devices of the exterior anode type, it has heretofore been customary to provide the inner end of the cathode-grid assembly with a disc of insulating material, the periphery of which the. inner surface of the anode to .the rod'18 which passes through the apertures in the discs 15 and 16 through the tube 17. The stem is moved inwardly until the flare 12 enga es the outer end of the glass portion 11. y virtue of the position of the rod within the anode 10 the .disc 16 is arranged concentrically of the anode 1O andv being of considerabl smaller diameter is separated therefrom ya substantial clearengages center the cathode and grid with respect to ance. The flare 12 is now sealed to the glass 20 the anode. When extremely high voltages portion 15, the heat being supplied from a flame 19. During the sealin operation the rod 18 maintains the stem su stantially concentric of the glass portion 11 whereb the disc 15 is arranged concentrically oi the anode 10. After the flare has been sealed to the portion 11, the rod 18 is unscrewed and withdrawn from the device and the tube 17 sealed. The vessel may now be exhausted according to the well known man ner through the tubulature 20 attached to the device at the time the flare is sealed to the portion 11.

The socket to receive the end of the rod 18 may be formed in a stud in a cap 10 closing the end of the anode 10 as shown in Fig. 1, or may be in an additional member 21 arranged near or in contact with the end of the anode and held in lace by an inwardly projecting annular s oulder 22 as shown in Fig. 3.

Although this invention has been disclosed in connection with an electron discharge device of the exterior anode type, it is, of course, apparent that it is applicable to devices wherein the anode does not 100 form a portion of the inclosing vessel. It is furthermore, of course, understood that various modifications may be made in the details of construction without in any way departing from the spirit of the invention 5 as set forth in the accompanying claims.

What is claimed is: L'An electron discharge device comprising an enclosin vessel havin a stem, an electrode assem ly supporte from said 110 are applied to tubes of this character it is found that the insulating disc breaks down and allows leakage between the electrodes. An object of the invention is an electron discharge device of the exterior anode type wherein the need for a centering disc is eliminated. 1

Another object of the invention is a'means for centering an electrode assembly within the vessel of an electron discharge device.

Another object of the invention is a method of arranging the cathode and grid assembly within the anode so that it is coaxial therewith and spaced therefrom.

Referring now to the drawings, Fig. 1 discloses the stem with the cathode and grid assembly mounted thereon being inserted within the inclosing vessel. Fig. 2 illustrates the fusing together of the flare and the glass portion of the inclosing vessel. Figure 3 is a detail view of a portion of the anode.

The inclosing vessel comprises a tubular metallic portion 10 to which is fused a glass portion 11, to the outer end of which is fused the flare 12 of the stem 13. On the stem 13 is .a collar 14 from which is supported a disc 15 of insulating material, and a second disc 16 of insulating material is supported from the disc 15, a grid andcathode assembly of substantially cylindrical configuration being supported between the discs 15 and 16. The discs 15 and'16 are provided with center apertures which are in alignment with a glass tube stem, said assembly comprising apertured discs, a plurality of electrodes supported by the said discs and a socket in the wall of said enclosing vessel, whereby a rod may be passed through the apertures and seated in said socket during the assembly of the device properly to position the electrode assembly within the vessel.

2. n electron discharge device comprising an enclosing vessel having a stem, an electrode assembly supported from said stem and a tubular member extended outwardly from the inner end of said stem, said electrode assembly being provided with apertures and said vessel being provided with a socket whereby a rod may be passed throu h'said tubular member and electrode assem ly and seated in said socket properly to position said electrode assembly in said vessel during the manufacture of the device.

3. In an electrode discharge device an enclosing vessel comprising a glass portion and a cup shaped metal portion which serves as the anode of the device, a stem carried by said glass portion, an electrode assembly supported from said stem, a tubular member projecting outwardly from the inner end of said stem, said electrode assembly having apertures and said anode having a socket ing of concentrically arranging a guiding member within the enclosing vessel and sliding said stem and electrodes along said guiding member into said vessel.

5. The method of positioning an electrode assembly in an electron discharge device comprismg an enclosing vessel, and electrodes mounted on a stem having a passageway through said eleetrodes and stem, said method comprising arranging a guiding member concentrically within said vessel and introducin said stem and electrode assembly into saldvessel by sliding said assembly over said guiding member, sealing said stem to said vessel and removing said guiding member.

In witness whereof, I hereunto subscribe my name this 18th day'of July, A. D. 1922.

WILLIAM G. HOUSKEEPER. 

